releaser threads

src/ustreamer/stream.c

@@ -49,7 +49,17 @@
 #endif
 
 
+typedef struct {
+	us_device_s		*dev;
+	us_queue_s		*queue;
+	pthread_mutex_t	*mutex;
+	atomic_bool		*stop;
+} _releaser_context_s;
 
+
+static void *_releaser_thread(void *v_ctx);
+
+static void _stream_release_buffer(us_stream_s *stream, us_hw_buffer_s *hw);
 static bool _stream_is_stopped(us_stream_s *stream);
 static bool _stream_has_any_clients(us_stream_s *stream);
 static bool _stream_slowdown(us_stream_s *stream);
@@ -74,6 +84,8 @@ static void _stream_expose_frame(us_stream_s *stream, us_frame_s *frame);
 us_stream_s *us_stream_init(us_device_s *dev, us_encoder_s *enc) {
 	us_stream_runtime_s *run;
 	US_CALLOC(run, 1);
+	US_MUTEX_INIT(run->release_mutex);
+	atomic_init(&run->release_stop, false);
 	US_RING_INIT_WITH_ITEMS(run->http_jpeg_ring, 4, us_frame_init);
 	atomic_init(&run->http_has_clients, false);
 	atomic_init(&run->http_last_request_ts, 0);
@@ -96,6 +108,7 @@ us_stream_s *us_stream_init(us_device_s *dev, us_encoder_s *enc) {
 void us_stream_destroy(us_stream_s *stream) {
 	us_blank_destroy(stream->run->blank);
 	US_RING_DELETE_WITH_ITEMS(stream->run->http_jpeg_ring, us_frame_destroy);
+	US_MUTEX_DESTROY(stream->run->release_mutex);
 	free(stream->run);
 	free(stream);
 }
@@ -113,6 +126,19 @@ void us_stream_loop(us_stream_s *stream) {
 	}
 
 	while (!_stream_init_loop(stream)) {
+		const uint n_releasers = stream->dev->run->n_bufs;
+		US_CALLOC(run->releasers, n_releasers);
+		for (uint index = 0; index < n_releasers; ++index) {
+			run->releasers[index].queue = us_queue_init(1);
+			_releaser_context_s *ctx;
+			US_CALLOC(ctx, 1);
+			ctx->dev = stream->dev;
+			ctx->queue = run->releasers[index].queue;
+			ctx->mutex = &run->release_mutex;
+			ctx->stop = &run->release_stop;
+			US_THREAD_CREATE(run->releasers[index].tid, _releaser_thread, ctx);
+		}
+
 		ldf grab_after = 0;
 		uint fluency_passed = 0;
 		uint captured_fps_accum = 0;
@@ -120,7 +146,7 @@ void us_stream_loop(us_stream_s *stream) {
 
 		US_LOG_INFO("Capturing ...");
 
-		while (!_stream_is_stopped(stream)) {
+		while (!_stream_is_stopped(stream) && !atomic_load(&run->release_stop)) {
 			US_SEP_DEBUG('-');
 			US_LOG_DEBUG("Waiting for worker ...");
 
@@ -128,9 +154,7 @@ void us_stream_loop(us_stream_s *stream) {
 			us_encoder_job_s *const ready_job = ready_wr->job;
 
 			if (ready_job->hw != NULL) {
-				if (us_device_release_buffer(stream->dev, ready_job->hw) < 0) {
-					goto close;
-				}
+				_stream_release_buffer(stream, ready_job->hw);
 				ready_job->hw = NULL;
 				if (ready_wr->job_failed) {
 					// pass
@@ -167,9 +191,7 @@ void us_stream_loop(us_stream_s *stream) {
 				fluency_passed += 1;
 				US_LOG_VERBOSE("Passed %u frames for fluency: now=%.03Lf, grab_after=%.03Lf",
 					fluency_passed, now_ts, grab_after);
-				if (us_device_release_buffer(stream->dev, hw) < 0) {
-					goto close;
-				}
+				_stream_release_buffer(stream, hw);
 			} else {
 				fluency_passed = 0;
 
@@ -196,6 +218,14 @@ void us_stream_loop(us_stream_s *stream) {
 		}
 
 	close:
+		atomic_store(&run->release_stop, true);
+		for (uint index = 0; index < n_releasers; ++index) {
+			US_THREAD_JOIN(run->releasers[index].tid);
+			us_queue_destroy(run->releasers[index].queue);
+		}
+		free(run->releasers);
+		atomic_store(&run->release_stop, false);
+
 		us_encoder_close(stream->enc);
 		us_device_close(stream->dev);
 
@@ -211,6 +241,28 @@ void us_stream_loop_break(us_stream_s *stream) {
 	atomic_store(&stream->run->stop, true);
 }
 
+static void *_releaser_thread(void *v_ctx) {
+	_releaser_context_s *ctx = v_ctx;
+	while (!atomic_load(ctx->stop)) {
+		us_hw_buffer_s *hw;
+		if (!us_queue_get(ctx->queue, (void**)&hw, 0.1)) {
+			US_MUTEX_LOCK(*ctx->mutex);
+			const int released = us_device_release_buffer(ctx->dev, hw);
+			US_MUTEX_UNLOCK(*ctx->mutex);
+			if (released < 0) {
+				break;
+			}
+		}
+	}
+	atomic_store(ctx->stop, true); // Stop all other guys
+	free(ctx);
+	return NULL;
+}
+
+static void _stream_release_buffer(us_stream_s *stream, us_hw_buffer_s *hw) {
+	assert(!us_queue_put(stream->run->releasers[hw->buf.index].queue, hw, 0));
+}
+
 static bool _stream_is_stopped(us_stream_s *stream) {
 	us_stream_runtime_s *const run = stream->run;
 	const bool stop = atomic_load(&run->stop);

src/ustreamer/stream.h

@@ -24,7 +24,10 @@
 
 #include <stdatomic.h>
 
+#include <pthread.h>
+
 #include "../libs/types.h"
+#include "../libs/queue.h"
 #include "../libs/ring.h"
 #include "../libs/memsink.h"
 #include "../libs/device.h"
@@ -35,6 +38,15 @@
 
 
 typedef struct {
+	pthread_t	tid;
+	us_queue_s	*queue;
+} us_stream_releaser_s;
+
+typedef struct {
+	us_stream_releaser_s	*releasers;
+	pthread_mutex_t			release_mutex;
+	atomic_bool				release_stop;
+
 	us_ring_s		*http_jpeg_ring;
 	atomic_bool		http_has_clients;
 	atomic_ullong	http_last_request_ts; // Seconds